The drum is the part used to wind the wire rope in the hoisting mechanism. Reel and reel shaft, flanged ring gear, Roller hub, bearing and bearing seat etc. make up the drum group. When one end of the reel shaft is equipped with a rotary lift limit position limiter When the switch of the brake is turned on, it must be ensured that the reel shaft rotates synchronously with the rotating shaft of the upward limit switch. Scroll material – general made of cast iron. If necessary, it can be made of cast steel or rolled and welded with steel plates.